This list is mainly from the website called Society of Janus, although i have added some titles to it. It has some excellent educational material on the page for people trying to find their way in BDSM. I would advise anyone just starting out or just wanting to learn something new to visit.
Also remember, if you have a kindle you can download samples of many books. Also if you do not have a kindle you can download a Kindle Reader to your smart phone or computer.
There are many informative BDSM books that are not fiction, and this is just a sampling that leans heavily toward classics. Most are available on Amazon. You can buy the books new or used and some on Kindle on Amazon. You may also be able to find them used on EBay.
General BDSM
50 Shades of Curious
by Bo Blaze, PCC
150 Shades of Play: A Beginner’s Guide to Kink
By Em and Lo
Come Hither: A Commonsense Guide To Kinky Sex
by Gloria G. Brame, Fireside
Consensual Sadomasochism: How To Talk About It and Do It Safely
by William A. Henkin, PhD. & Sybil Holliday, CCSSE, Daedalus Publishing
Different Loving
by Gloria Brame, Job Jacobs & Jon Brame, Villard Books
Learning the Ropes: A Basic Guide to Safe and Fun S/m Lovemaking
by Race Bannon
Living M/s, A Book for Masters, slaves and Their Relationships
byDan Williams and Dawn Williams
The New Bottoming Book
by Dossie Easton & Janet Hardy (or Liszt), Greenery Press
The New Topping Book
by Dossie Easton & Janet Hardy (or Liszt), Greenery Press
Screw the Roses, Send Me the Thorns
by Philip Miller & Molly Devon, Mystic Rose Books
Sensuous Magic
by Pat Califia, Cleis Press.
SM 101
by Jay Wiseman, Greenery Press
Dominance and Submission
Becoming a Slave
by Jack Rinella, Rinella Editorial Services
Erotic Slavehood: A Miss Abernathy Omnibus
by Christina Abernathy, Greenery Press
The Loving Dominant
by John Warren, Greenery Press.
The Mistress Manual: the Good Girl’s Guide to Female Dominance
by Lorelei, Greenery Press
Partners in Power
by Jack Rinella, Greenery Press
The Sexually Dominant Woman: A Workbook for Nervous Beginners
by Lady Green, Greenery Press
Impact Play
The Compleat Spanker
by Lady Green, Greenery Press
In Defense of Flogging
by Peter Moskos
Flogging
by Joseph Bean, Greenery Press
Toybag Guide to Canes and Caning
by Janet Hardy, Greenery Press
Bondage
Erotic Bondage Handbook
by Jay Wiseman, Greenery Press
The Seductive Art of Japanese Bondage
by Midori, Greenery Press
Shibari You Can Use: Japanese Rope Bondage
by Lee Bridgett Harrington, Mystic Productions
Two Knotty Boys Showing You the Ropes- A Step by Step Illustrated Guide
by Two Knotty Boys and Larry Utley
Back on the Ropes
by Two Knotty Boys, Green Candy Press
LGBTIQ
Coming to Power: Writing and Graphics on Lesbian SM
by Samois, Allyson.
Leathersex: A Guide for the Curious Outsider and Serious Player
by Joseph Bean, Daedalus Publishing.
Urban Aboriginals: The Celebration of Leather Sexuality
by Geoff Manes, Daedalus Publishing.
Ultimate Guide to Anal Sex for Men
by Bill Brent, Cleis Press
The Master’s Manual
by Jack Rinella, Daedalus Publishing.
Miscellaneous
The Adventurous Couple’s Guide to Strap-on Sex
by Violet Blue
Anal Pleasure and Health: Guide for Men, Women and Couples
by Dr. Jack Morin, Down There Press
The Ethical Slut
by Dossie Easton and Janet Hardy (or Liszt), Greenery Press
The Family Jewels
by Hardy Haberman, Greenery Press
A Hand in the Bush: The Fine Art of Vaginal Fisting
by Deborah Addington,
Greenery Press. No Kindle
LeatherFolk: Radical Sex, People, Politics, and Practice
by Mark Thompson, Daedalus.
Ultimate Guide to Anal Sex for Women
by Tristan Taormina, Cleis Press
When Someone you Love is Kinky
by Dossie Easton and Catherine Lizst, Greenery Press
Healthcare Without Shame
by Charles Moser
Play Piercing
by Deborah Addington, Greenery Press